公开(公告)号：US5543861A

公开(公告)日：1996-08-06

申请号：US401280

申请日：1995-03-09

申请人： Vincent C. Harradine ,  Howard J. Teece ,  Michael J. Ludgate ,  Rajan Bhandari ,  Gavin A. Walker

发明人： Vincent C. Harradine ,  Howard J. Teece ,  Michael J. Ludgate ,  Rajan Bhandari ,  Gavin A. Walker

IPC分类号： H04N5/91 ,  G11B20/10 ,  H04N5/92 ,  H04N5/926 ,  H04N5/937 ,  H04N9/64

CPC分类号： H04N5/937 ,  G11B2020/10953 ,  H04N5/9205 ,  H04N5/9261

摘要： A storage mechanism utilizing a single data recorder from which multiple channels of compressed video data may be simultaneously accessed. The data access to and from the data recorder via a single data access path takes place at a higher data rate (f.sub.1, f.sub.2) than the data rate (f.sub.3, f.sub.4) at which that compressed data needs to be decoded to support a video signal. A video router is used to direct the reproduced data stored within two data channel buffers to respective JPEG decoders where they are decompressed into a signal suitable for driving two digital monitors. In operation, a segment of compressed video data for one channel is recovered from the data recorder and stored within one of the buffers from which it is continuously read at a lower data rate (f.sub.3, f.sub.4). The data recorder then cues to another part of the medium from which data for the second channel is reproduced and stored within another buffer. The process is then repeated.

摘要翻译： 利用单个数据记录器的存储机构可以同时访问多个压缩视频数据的通道。 通过单个数据访问路径对数据记录器进行数据访问的数据速率（f1，f2）比要压缩数据需要解码以支持视频信号的数据速率（f3，f4）要高 。 视频路由器用于将存储在两个数据信道缓冲器内的再现数据引导到相应的JPEG解码器，在那里它们被解压缩成适合于驱动两个数字监视器的信号。 在操作中，从数据记录器恢复一个通道的压缩视频数据段，并存储在以较低数据速率（f3，f4）连续读取的一个缓冲器中。 数据记录器然后提示到媒体的另一部分，从该数据记录再生数据并存储在另一个缓冲器中。 然后重复该过程。

公开(公告)号：US4862259A

公开(公告)日：1989-08-29

申请号：US200531

申请日：1988-05-31

申请人： Clive H. Gillard ,  Vincent C. Harradine

发明人： Clive H. Gillard ,  Vincent C. Harradine

IPC分类号： H04N11/00 ,  H04N7/01 ,  H04N7/173 ,  H04N7/26 ,  H04N7/32 ,  H04N7/36 ,  H04N7/46 ,  H04N9/877 ,  H04N9/896 ,  H04N11/04 ,  H04N11/20 ,  H04N11/24

CPC分类号： H04N7/014 ,  H04N19/186 ,  H04N19/51 ,  H04N19/523 ,  H04N19/527 ,  H04N19/533 ,  H04N19/577 ,  H04N9/877 ,  H04N9/896

摘要： Apparatus for reducing the number of motion vectors associated with a digital television image comprises a vector filter, a vector calculator and a vector processor for deriving for each block of pixels within the television image a plurality of motion vectors representing the most common motion vectors of pixels in the block, each of the plurality of motion vectors having associated with it a figure of merit based upon the weighted absolute difference of the motion vectors of pixels in the block, and a vector reducer for associating with the plurality of motion vectors, a further motion vector for the same position from the previous field and a further motion vector for the same position from the next field, each of said further motion vectors having associated with it a figure of merit, and for selecting a smaller plurality of motion vectors from the plurality of motion vectors and the further motion vectors in dependence on the figures of merit.

公开(公告)号：US5161005A

公开(公告)日：1992-11-03

申请号：US482048

申请日：1990-02-20

申请人： Vincent C. Harradine

发明人： Vincent C. Harradine

IPC分类号： H04N9/64

CPC分类号： H04N9/643

摘要： A hue control circuit receives a video signal at an input terminal in the form of alternating multiplexed color difference samples Cb and Cr. The video signal is multiplied in a multiplier by a factor cos .phi., .phi. representing a desired hue adjustment, and the resulting multiplied signal is supplied to an adder. The video signal is also subjected to order inversion by flip-flops and a buffer circuit as a result of which the order of corresponding pairs of samples Cb and Cr is reversed. The reversed-order video signal is multiplied in a second multiplier by one of alternating factors -sin .phi. and +sin .phi., and the resulting multiplied signal is supplied to the adder. The multiplied signals are summed in the adder to produce hue adjusted color difference samples Hb and Hr, where:Hb=Cb cos .phi.-Cr sin .phi.andHr=Cb sin .phi.+Cr cos .phi..

摘要翻译： 色调控制电路以交替复用色差样本Cb和Cr的形式在输入端接收视频信号。 视频信号在乘法器中乘以因子cos phi，表示期望色调调整的phi，并将所得到的相乘信号提供给加法器。 视频信号还通过触发器和缓冲电路进行顺序反转，结果相应的样本对Cb和Cr的顺序相反。 反向视频信号在第二乘法器中乘以交替因子-sin phi和+sinφi之一，并且所得到的相乘信号被提供给加法器。 相加的信号在加法器中相加以产生色调调整色差样本Hb和Hr，其中：Hb = Cb cos phi -Cr sin phi和Hr = Cbsinφi+ Crcosφi。

公开(公告)号：US4901145A

公开(公告)日：1990-02-13

申请号：US200562

申请日：1988-05-31

申请人： Vincent C. Harradine ,  Clive H. Gillard

发明人： Vincent C. Harradine ,  Clive H. Gillard

IPC分类号： H04N11/00 ,  H04N7/01 ,  H04N7/32 ,  H04N9/877 ,  H04N11/20 ,  H04N11/24

CPC分类号： H04N19/533 ,  H04N7/014 ,  H04N9/877

摘要： Apparatus for motion vector estimation in a television image uses a block matching technique with successive refinement of the motion vector estimate. The apparatus comprises a vector filter and a vector calculator.

公开(公告)号：US5087966A

公开(公告)日：1992-02-11

申请号：US482049

申请日：1990-02-20

申请人： Vincent C. Harradine

发明人： Vincent C. Harradine

IPC分类号： H04N9/64 ,  H04N9/69

CPC分类号： H04N9/64

摘要： A digital color corrector for a color component of a video signal is operable to effect gamma, gain and black level correction. The gamma correction k is applied to a multiplier receiving the input signal E. Black level correction B is applied to an adder, and further arithmetic circuits are provided together with gain correction A to implement the equation.delta.E=[k.multidot.E+(A-B-k)].multidot.E+Bwhich includes a good approximation of the gamma correction without the need to use log and anti-log circuits. The output .delta.E represents an offset correction signal to be added to the original color component signal.

公开(公告)号：US4864393A

公开(公告)日：1989-09-05

申请号：US199683

申请日：1988-05-31

申请人： Vincent C. Harradine ,  Clive H. Gillard

发明人： Vincent C. Harradine ,  Clive H. Gillard

IPC分类号： H04N11/00 ,  H04N7/01 ,  H04N7/26 ,  H04N7/32 ,  H04N7/46 ,  H04N9/877 ,  H04N9/896 ,  H04N11/20 ,  H04N11/24

CPC分类号： H04N7/014 ,  H04N19/186 ,  H04N19/51 ,  H04N19/523 ,  H04N19/527 ,  H04N19/533 ,  H04N19/577 ,  H04N9/877 ,  H04N9/896

摘要： Apparatus for motion vector estimation in a television image using a digitized signal representing the image, comprises a vector filter and a vector calculator for determining motion in the image at points spaced a predetermined number of pixels horizontally and a predetermined number of pixels vertically by a block matching technique, thereby to derive motion vectors, and a sub-pixel motion estimator for refining the selection of the motion vectors by determining a sub-pixel offset representing motion between fields of the image not equal to an integral multiple of the spacing between pixels.

公开(公告)号：US4862260A

公开(公告)日：1989-08-29

申请号：US199680

申请日：1988-05-31

申请人： Vincent C. Harradine ,  Clive H. Gillard ,  John W. Richards

发明人： Vincent C. Harradine ,  Clive H. Gillard ,  John W. Richards

IPC分类号： H04N11/00 ,  H04N7/01 ,  H04N7/26 ,  H04N7/32 ,  H04N9/877 ,  H04N9/896 ,  H04N11/20 ,  H04N11/24

CPC分类号： H04N7/014 ,  H04N19/186 ,  H04N19/51 ,  H04N19/527 ,  H04N9/877 ,  H04N9/896

摘要： Apparatus for processing motion vectors associated with a digital television image, comprises a vector filter and a vector calculator for deriving a plurality of motion vectors respectively representing the motion of pixels in a corresponding plurality of blocks of pixels in the image, a processor for distributing the plurality of motion vectors into groups, each group comprising motion vectors lying within a respective different predetermined range of magnitudes and directions, and a processor for substituting for the motion vectors in each of a plurality of the groups into which the largest number of the motion vectors fall, a single motion vector representing the motion vectors in the respective group.